{"id":"CVE-2026-49291","state":"PUBLISHED","title":"mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call","description":"mcp-memory-service is a semantic memory layer for AI applications. Prior to version 10.65.3, the HTTP MCP JSON-RPC endpoint at `/mcp` requires only OAuth `read` scope for all requests, then dispatches `tools/call` directly to handlers that include mutating tools. A read-only OAuth client can call `store_memory` and `delete_memory` through MCP even though the corresponding REST endpoints require `write` scope. Version 10.65.3 patches the issue.","publishedAt":"2026-06-19T17:59:48.862Z","updatedAt":"2026-06-22T17:07:55.536Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["doobidoo mcp-memory-service"],"affected":[{"vendor":"doobidoo","product":"mcp-memory-service","versions":[{"version":"< 10.65.3","status":"affected"}]}],"references":["https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service/","https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-2r68-g678-7qr3","https://pypi.org/project/mcp-memory-service/10.65.3"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49291.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49291","state":"PUBLISHED","datePublished":"2026-06-19T17:59:48.862Z","dateUpdated":"2026-06-22T17:07:55.536Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-28T20:07:58.862Z"},"containers":{"cna":{"title":"mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call","descriptions":[{"lang":"en","value":"mcp-memory-service is a semantic memory layer for AI applications. Prior to version 10.65.3, the HTTP MCP JSON-RPC endpoint at `/mcp` requires only OAuth `read` scope for all requests, then dispatches `tools/call` directly to handlers that include mutating tools. A read-only OAuth client can call `store_memory` and `delete_memory` through MCP even though the corresponding REST endpoints require `write` scope. Version 10.65.3 patches the issue."}],"affected":[{"vendor":"doobidoo","product":"mcp-memory-service","versions":[{"version":"< 10.65.3","status":"affected"}]}],"references":[{"url":"https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service/","name":"https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service/","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-2r68-g678-7qr3","name":"https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-2r68-g678-7qr3","tags":["x_refsource_MISC"]},{"url":"https://pypi.org/project/mcp-memory-service/10.65.3","name":"https://pypi.org/project/mcp-memory-service/10.65.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-19T17:59:48.862Z"},"source":{"advisory":"GHSA-2r68-g678-7qr3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-22T17:07:36.136160Z","id":"CVE-2026-49291","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-22T17:07:55.536Z"}}]}}}